Toothbrush holder



FIG. 1 is a top, front, and right side perspective view of a toothbrush holder showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof, the rear being identical in appearance to that shown; and

FIG. 4 is a bottom plan view thereof. 

The ornamental design for a toothbrush holder, as shown and described. 